20021020111010 has 32 divisors (see below), whose sum is σ = 36288498582000. Its totient is φ = 7952731361280.

The previous prime is 20021020110979. The next prime is 20021020111019. The reversal of 20021020111010 is 1011102012002.

It can be written as a sum of positive squares in 8 ways, for example, as 403907278369 + 19617112832641 = 635537^2 + 4429121^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021020110982 and 20021020111000.

It is not an unprimeable number, because it can be changed into a prime (20021020111019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4525070 + ... + 7779350.

Almost surely, 2^{20021020111010} is an apocalyptic number.

20021020111010 is a deficient number, since it is larger than the sum of its proper divisors (16267478470990).

20021020111010 is a wasteful number, since it uses less digits than its factorization.

20021020111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258566.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021020111010 its reverse (1011102012002), we get a palindrome (21032122123012).

The spelling of 20021020111010 in words is "twenty trillion, twenty-one billion, twenty million, one hundred eleven thousand, ten".